Times for a surgical procedure are normally distributed. There are two methods. Method A has a mean of 33 minutes and a standarddeviation of 8 minutes, while method B has a mean of 37 minutes and a standard deviation of 4.0 minutes.(a) Which procedure is preferred if the procedure must be completed within 34 minutes?O Method AO Method BO Either Method(b) Which procedure is preferred if the procedure must be completed within 45.0 minutes?O Method AO Method BO Either Method(c) Which procedure is preferred if the procedure must be completed within 41 minutes?O Method AO Method BO Either MethodH!G*< Prev?19 of 19⠀⠀⠀WNext >77°F CI

Times for surgical procedure are normally distributed.Method A:Mean Standard deviation Method B:Mean…

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A math teacher claims that she has developed a review course that increases the scores of students on the math portion of a college entrance exam. Based on data from the administrator of the exam, scores are normally distributed with u = 520. The teacher obtains a random sample of 2200 students, puts them through the review class, and finds that the mean math score of the 2200 students is 525 with a standard deviation of 110. Complete parts (a) through (d) below. (a) State the null and alternative hypotheses. Let u be the mean score. Choose the correct answer below. O A. Ho: H= 520, H,: µ> 520 %3D B. Ho: μ 520 С. Но: и> 520, Hа: p#520 D. Ho: и%3D520, Hа: p#520 (b) Test the hypothesis at the a = 0.10 level of significance. Is a mean math score of 525 statistically significantly higher than 520? Conduct a hypothesis test using the P-value approach. Find the test statistic. to = %3D
Mason earned a score of 226 on Exam A that had a mean of 250 and a standard deviation of 40. He is about to take Exam B that has a mean of 550 and a standard deviation of 25. How well must Mason score on Exam B in order to do equivalently well as he did on Exam A? Assume that scores on each exam are normally distributed.
The ability to determine the age of some individuals can be difficult if there are not quality government records of birth. Bone growth takes place at the growth plates at the end of long bones. Once all growth plates fuse, growth stops, and an individual is considered a biological adult. The age at which growth plates fuse for males is approximately normally distributed with a mean of 18.7 years and a standard deviation of 16 months. Complete parts (a) through (d) (a) What is the probability a male's growth plates fuse after age 20? The probability a male's growth plates fuse after age 20 is (Round to four decimal places as needed) (b) What is the probability a male's growth plates fuse before age 177 The probability a male's growth plates fuse before age 17 is (Round to four decimal places as needed.) (c) What proportion of male growth plates fuse between 16 and 17 years of age? COLLE The proportion of male growth plates that fuse between 16 and 17 years of age is (Round to four…
You may need to use the appropriate appendix table or technology to answer this question. A professor at a local university noted that the exam grades of her students were normally distributed with a mean of 72 and a standard deviation of 13. If 68 percent of the students received grades of C or better, what is the minimum score of those who received Cs? O 58.57 65.87 78.13 O 85.43
Times for a surgical procedure are normally distributed. There are two methods. Method A has a mean of 31 minutes and a standard deviation of 2 minutes, while method B has a mean of 35 minutes and a standard deviation of 1.0 minutes. (a) Which procedure is preferred if the procedure must be completed within 30 minutes? O Method A O Method B O Either Method (b) Which procedure is preferred if the procedure must be completed within 38.0 minutes? O Either Method O Method A O Method B (c) Which procedure is preferred if the procedure must be completed within 37 minutes? O Method B O Either Method O Method A < Prev 19 of 19 Next to search 22 立

Which procedure is preferred if the procedure must be complete in 26 minutes.
Times for a surgical procedure are normally distributed. There are two methods. Method A has a mean of 21 minutes and a standard deviation of 5 minutes, while method B has a mean of 25 minutes and a standard deviation of 25 minutes. (a) Which procedure is preferred if the procedure must be completed within 23 minutes? O Method A O Method B O Either Method (b) Which procedure is preferred if the procedure must be completed within 32.0 minutes? O Method A O Method B O Either Method (c) Which procedure is preferred if the procedure must be completed within 29 minutes? OMethod A O Method B O Either Method Next Prey 19 of 19 here to search op t9 144 14 ou ts 47 47 to 40 16 is 券

Which procedure is preferred if the procedure must be completed within 32 minutes
Which procedure is preferred if the procedure must be done in 31.5 minutes
A standardized test for graduate school admission has a mean score of 159 with a standard deviation of 8 and a unimodal, symmetric distribution of scores. A test preparation organization teaches small classes of 4 students at a time. A larger organization teaches classes of 64 at a time. Both organizations publish the mean scores of all their classes. A mean score of 167 is SD _____ above the mean for the smaller organization, and ______ SD above the mean for the larger organization. It is more likely that the smaller organization will have that success.
The salaries of professional baseball players are heavily skewed right with a mean of $3.2 million and a standard deviation of $2 million. The salaries of professional football players are also heavily skewed right with a mean of $1.9 million and a standard deviation of $1.5 million. A random sample of 40 baseball players’ salaries and 35 football players’ salaries is selected. The mean salary is determined for both samples. Let represent the difference in the mean salaries for baseball and football players. Which of the following represents the shape of the sampling distribution for ? skewed right since the populations are both right skewed skewed right since the differences in salaries cannot be negative approximately Normal since both sample sizes are greater than 30 approximately Normal since the sum of the sample sizes is greater than 30
3 In the 1800s, German physician Carl Reinhold, took millions of axillary (i.e. armpit) temperatures from soldiers. This study established that body temperature is normally distributed and the standard normal human body temperature is 98.6℉ with a standard deviation of 0.72 ℉. In a recent study, American researchers obtained 5,000 axillary temperatures from a Los Angeles hospital. The mean of these temperature readings was 97.9 ℉. Assuming a Type I error risk of no more than 5%, did the findings support the theory that human, body temperature has decreased since the 1800s? What is the standard error? (round to nearest hundredth) What is the Z obt? (round to the nearest tenth)

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